Snap-On Clog Shoe Liner for Secure Weather Protection

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Solution Overview

Problem

Conventional footwear liners are not suitable for Crocs™-style shoes due to their unique design, leading to slippage, discomfort, and inability to protect against cold and wet conditions, necessitating a need for a secure, reusable, and weather-resistant liner.

Innovation Solution

A waterproof outer layer with a soft inner layer, featuring studs and snap-on buttons for secure attachment to Crocs™-style shoes, covering the foot or its front half, and extending through ventilator holes to prevent slippage and provide warmth and protection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional footwear liners are used with Crocs-style shoes, then they provide basic foot coverage, but they slip during use and cannot be securely fastened

Engineering Contradiction:
Improveliner securityVSAvoidliner adjustment frequency
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The liner is divided into functional segments: a footbed portion for the sole, an upper foot covering portion for the top of the foot, and a heel counter portion for the heel. This segmentation allows each part to be optimized for its specific function, with the upper foot covering portion specifically designed with stud receiving features to prevent slippage.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The liner is designed to be inserted inside the Crocs-style shoe, with the upper foot covering portion fitting within the shoe's upper section. The studs are received within dedicated stud receiving features in the shoe, creating a nested configuration that secures the liner in place.

Inventive Principle:
Principle #7Nested doll (Nesting)

2Object-affected harmful factors

If liners are used to protect feet from cold and wet conditions, then weather protection is improved, but the liner becomes incompatible with the unique design of Crocs-style shoes

Engineering Contradiction:
Improveweather element protectionVSAvoidliner compatibility
Core Design Contradiction:
Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

The liner incorporates a waterproof outer layer specifically to protect against water and cold weather elements, while the inner layer provides comfort against the foot. The upper foot covering portion is specifically designed to interface with the ventilator holes and inner surface of Crocs-style shoes, making it adaptable to this unique shoe design.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The liner is designed to serve multiple functions: it provides weather protection through its waterproof outer layer, comfort through its soft inner layer, and secure attachment through studs received in stud receiving features. This multi-functionality makes it suitable for both cold/dry and cold/wet conditions while being compatible with Crocs-style shoes.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Reliability

If studs and snap-on buttons are added to secure the liner, then slippage is prevented, but the device complexity increases

Engineering Contradiction:
Improveliner attachment securityVSAvoidfastening mechanism complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The fastening mechanism is extracted from the liner itself and implemented as separate components: studs attached to the upper foot covering portion and snap-on buttons attached to the shoe. This separation simplifies the liner construction while providing secure attachment through the stud-button interface.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The snap-on buttons automatically engage with the studs when the liner is inserted into the shoe, providing self-securing functionality. The user simply needs to insert the liner, and the studs and buttons automatically fasten the liner to the shoe without requiring additional manual fastening steps.

Inventive Principle:
Principle #25Self-service

Data Source

PatentUS12495864B2Snap-on clog-style shoe liner and method of use
Publication Date: 2025.12.16 SADLER KAITLIN
  • US12495864B2 patent drawing
  • US12495864B2 patent drawing
  • US12495864B2 patent drawing

AI summary

A protective liner designed for use with clog shoes and Crocs™-style shoes. The liner comprises a waterproof outer layer and a soft and fuzzy inner layer that are adhered to each other, with both layers having similar dimensions. In one embodiment, the liner has a footbed functioning as an insole and an upper foot covering portion designed to cover the top portion of the foot. Additionally, the liner has a pair of studs disposed on the upper foot covering portion, which extend out of two ventilator holes of a plurality of ventilator holes disposed in the Crocs™-style shoe. A pair of securement buttons are used for releasably fastening to the studs to secure the liner to the shoe. In another embodiment, the liner does not have a footbed. The protective liner covers the foot of a user for protecting from weather elements while wearing the Crocs™-style shoe.